On a weekend when many Tucsonans are camping in the mountains or partying at poolside, Dan Hawkins has been standing outside a supermarket in 100-degree heat, clutching a fistful of memories that seem to grow dimmer each year. There was a time when passers-by eagerly scooped up the scarlet Buddy Poppies Hawkins has peddled each Memorial Day weekend since 1987. Nowadays, there are far fewer takers for the bright red flowers that recall America's fallen troops. "It used to be a big thing," said Hawkins, 72, a Vietnam veteran and leader of the Veterans of Foreign Wars Post 7399. "Pretty...